Comprehensive Description

provided by Smithsonian Contributions to Zoology
Oithona amazonica Burckhardt, 1912

Oithona amazonica Burckhardt, 1912:726; 1913:422, pl. 15P: figs. 6–22; pl. 15Q: figs. 2, 3; pl. 16R: figs. 2–4, 7–9, 11, 12; pl. 16s: figs. 1, 3–8, 17.

Oithona amazonica continentalis Lindberg, 1954:193–195, fig. 1.

MATERIAL—3 and 3 from PN-8-260.

FEMALE.—Lengths 0.61, 0.60, 0.60 mm; Pr/ Ur-1.3, 1.3, 1.4. ReP1 (Figure 2e) with 1–1–3 Se. St Re3P1 seta-like (see “Remarks”); Se ReP2 11–3, ReP3 1–1–1, and ReP4 0–0–1; St Re3P2–4 well developed. Ri3P4 with both setae unmodified; Ri3P4 proximal seta straight, slightly thickened, with serrate flange on distal 2/3 of medial edge (Figure 2h). Knob near genital opening armed with a minute, slender spine (Figure 2b).

MALE.—Length of specimens 0.57, 0.56, 0.55 mm; Pr/Ur-1.7, 1.5, 1.6. Se ReP1 1–1–3 (Figure 2k); Se ReP2–4: 1–1–3, 1–1–1, 0–0–1; St Re3P1–4 well developed; Ri3P4 proximal seta not modified. Cph and flap (Figure 2j) not dissected from specimens. Pore signature similar to hebes/fonsecae pattern (described under O. fonsecae) but with distinct hiatus between dorsal horizontal row and 2 anterior columns of organs making up anterodorsal cluster. In O. hebes and O. fonsecae longitudinal row proceeds into and is continuous with anterodorsal cluster.
bibliographic citation
Ferrari, Frank D. and Bowman, Thomas E. 1980. "Pelagic copepods of the family Oithonidae (Cyclopoida) from the east coasts of Central and South America." Smithsonian Contributions to Zoology. 1-27. https://doi.org/10.5479/si.00810282.312